Electrochemical and Physical Properties of Layered-Spinel Composite Cathode Powders Prepared by Spray Pyrolysis

The xLi2MnO3·(1-x)Li4Mn5O12 (x = 1, 0.5, 0.3, 0) composite cathode powders are prepared by spray pyrolysis. The composite powders before and after post-treatment at 600oC have fine size and aggregated spherical morphologies of the nanometer-sized primary particles irrespective of the compositions of...

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Bibliographic Details
Published in:International journal of electrochemical science 2012-12, Vol.7 (12), p.12110-12120
Main Authors: Sim, Chul Min, Hong, Young Jun, Kim, Min Ho, Jang, Yong Seung, Park, Byung Kyu, Kang, Yun Chan
Format: Article
Language:English
Subjects:
cathode material
composite material
lithium battery
spray pyrolysis
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Summary:The xLi2MnO3·(1-x)Li4Mn5O12 (x = 1, 0.5, 0.3, 0) composite cathode powders are prepared by spray pyrolysis. The composite powders before and after post-treatment at 600oC have fine size and aggregated spherical morphologies of the nanometer-sized primary particles irrespective of the compositions of the cathode powders. The initial discharge capacity of the Li2MnO3 component is 258 mAh g−1, in which the Coulombic efficiency is 85%. The discharge capacity of the Li2MnO3 powders drops from 258 to 115 after 10 cycles. The initial discharge capacities of xLi2MnO3·(1-x)Li4Mn5O12 composite powders are 225 ,219 and 211 mAh g−1 when the x values are 0.5 ,0.3 and 0. The capacity retentions of the composite powders are 88, 90, and 83 % after 30 cycles when the x values are 0.5, 0.3, and 0.
ISSN:1452-3981
1452-3981
DOI:10.1016/S1452-3981(23)16530-8